ni.com is currently undergoing scheduled maintenance.

Some services may be unavailable at this time. Please contact us for help or try again later.

LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

scan string problem

Hi everyone!

 

I am relatively new to labview programming and have got stuck to resolve to the follwing issue.

 

I have got a an alarm panel, which has a default output in the following format (in case of no alarm)

 

$IIARL,,000,V,A,*38 [default value]

 

The 000 porion shows the address of the alarm and the last two digits represent a particular code, so I am only interested in these two values.

I tried the follwing string format to scan only the requisite paramters.

 

$IIARL,,%3d,V,A,*%2d

match characters ($IIARL,,) ----- scan 3 places of decimal value (%3d) ----- match characters (,V,A,*) ----- scan 2 posiitons of decimal values (%2d)

 

After running the VI, I got the following values

adress = 0

code = 38

remaining string value = empty

 

This is nice and accpetable.

 

But when an alarm event occurs the address and code changes to lets suppose 000 > 013 and 38 > 84.

In this case output becomes

adress = 13

code = 0

remianing string value = V,A,*84

 

where, ideally I am looking for the following results

adress = 13 or 013

code = 84

remaining string value = empty

 

Best Regards

Shabbir

0 Kudos
Message 1 of 7
(3,660 Views)

It would help to debug if you attached your VI with your test cases.  That way we can see if there's a problem with the way things are being wired or if there's something more to it than just that.

0 Kudos
Message 2 of 7
(3,656 Views)

Use %d instead of %3d and %2d.  This way you can have any number of characters for the address.

 

Also, am I seeing that a comma is missing in the error message (right after the address)?  Or was that a typo?



There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
"Not that we are sufficient in ourselves to claim anything as coming from us, but our sufficiency is from God" - 2 Corinthians 3:5
0 Kudos
Message 3 of 7
(3,629 Views)

I would recommend to use "spreadsheet string to array", with the comma as separator. Then you can acces the fields via array index.

 

scan string problem.png

Greets, Dave
0 Kudos
Message 4 of 7
(3,621 Views)

I did exactly what you say you did, and got the expected answers of 13, 84, and an empty Remaining String.

 

Bob Schor

0 Kudos
Message 5 of 7
(3,600 Views)

@crossrulz, I think, I have tried this randomly but don't excatly remember the results

0 Kudos
Message 6 of 7
(3,574 Views)

@daveTW

 

will defintely give it a try tomorrow morning and will reprt back here

0 Kudos
Message 7 of 7
(3,569 Views)